8(r-40)=40

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Solution for 8(r-40)=40 equation: 



8(r-40)=40

We move all terms to the left:

8(r-40)-(40)=0

We multiply parentheses

8r-320-40=0

We add all the numbers together, and all the variables

8r-360=0

We move all terms containing r to the left, all other terms to the right

8r=360

r=360/8

r=45

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